Stop

The quickness of the stop influences both line speed and loop size. Slow
stops create open loops with slow speeds; however, sudden stops create
narrow loops with high speeds.

The slow stop is made when the caster flings his arms out in a futile
attempt to gain distance. It’s like trying to push a rope.
Releasing the rod’s stored energy all at once by making an abrupt
stop propels the line efficiently in a tight casting loop.

The caster conserves energy by casting with smooth controlled acceleration
and by stopping hard. This makes the rod do most of the work by flexing
and releasing its potential energy all at once. For example: a bicyclist
accelerates fast and hits a wall; the bike comes to a sudden stop throwing
its rider into the wall. On the other hand, if the bike comes to a slow
stop and merely bumps the wall the rider is hardly displaced.